Scavenger for internal-combustion-engine igniters.



A. H. DE GASTON & F McLEAN.

SCAVENGER FOR INTERNAL COMBUSTION ENGINE IGNITERS. APPLICATION FILED JULY], 1913. RENEWED FEB. 29. 1916.-

1,177,568. Patented Mar. 28,1916.

, INVENTORS WITNESSES: 17-h. DE GasToM 7 ?W By *gy g K 1 Pk- 4 ATTORNEYS.

UNITED STATES PATENT OFFICE.

ALBERT H. DE GASTON AND FREDERIC McLEAN, OF SACRAMENTO, CALIFORNIA, ASSIGNORS TO GLOBE IRON WORKS, OF SACRAMENTO, CALIFORNIA, A CORPORA- TION OF CALIFORNIA.

SCAVENGER FOB INTERNAL-COMBUSTION-ENGINE IGNITERS.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed iluly 7, 1918, Serial No. 777,813. Renewed February 29, 1918. Serial No. 81,137.

To all whom it may concern: a

Be it known that we, ALBERT H. DE GAS- TON, a citizen of the United States, and Fnnonnro MCLEAN, a subject of Great Britain, residents of the city of Sacramento,

county of Sacramento, State of California, have invented certain new and useful Improvements in Scavengers for Internal- Combustion-Engine Igniters, of which the following is a specification.

The invention relates to internal combustion engines and particularly to internal combustion engines designed to operate on oil fuel, which is introduced into the cylinder and exploded through the agency of a hot igniter.

The object of the invention is to provide means for removing from the igniter any deposit which may form thereon.

Another object of the invention isto provide means for cleaning the igniter at each stroke of the piston.

With these and other objects in-view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described, illustrated in the accompanying drawings and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of the structure may be made without departing from the spirit of or sacrificing any of the advantages of the invention.

The invention is illustrated in the accom-.

panying drawings, in which,

Figure 1 1s a cross section of the head end of an engine cylinder, equipped with the device of the present invention. Fig. 2 is a fragmentary cross section of the head end of the engine showing the piston at the end of its forward stroke.

The present engine is designed to operate .on oil fuel which is introduced into the cylsuccessive charges of oil. are injected into the cylinder and onto the tongue of the igniter, where they are volatilized and mix with the air in the cylinder to produce an explosive mixture. -The heat produced by the igniter and the Walls of the cylinder the operation of the engine. In order to remove this residue as rapidly as it is dc posited, the scavenging flange 7 is arranged on the end of the piston 8 in such po'sitibn that it scrapes or wipes the deposit from the igniter at each stroke. The igniter tongue 4 is preferably formed cylindrical in shape, and the scavenging flange is made annular to c'onform to the shape of the flange. At the end of each backward stroke of the piston the scavenging flange engages the igniter tongue and removes the residue therefrom. The present engine is of the two cycle type and the charge of fuel is injected into the cylinder at the beginning of the backward stroke of the piston, allowing v the oil to be volatilized before the scavenging flange reaches the igniter. In order that the internal and external pressures in the igniter tongue and in the annular scavenging flange may be equalized when the flange telescopes the tongue, the apertures 9 and 11 have been provided in the tongue and flange respectively. The cylinder head 6 is pref-- erably provided with an inwardly flaring aperture 12, in which the igniter is arranged so that the thermal contact between the ig- I niter and the cylinder head is small, and to provide communication between the interior of the cylinder and the aperture 9 in the igniter tongue. The igniter and the means for holding it removably in position are shown and claimed in another application filed contemporaneously herewith and numbered Serial No. 777,612.

We claim:

1. In an internal combustion engine, an

igniter, means for projecting a charge of fuel onto the outer surface of said igniter and means on the piston adapted to engage said outer surface and Wipe therefrom an} deposit left by the burned fuel.

2. In an internal combustion engine adapted to operate on oil fuel which leaves deposit therefrom.

-3. In an internal combustion engine having a cylinder and piston, a hollow cylindrical igniter having a transverse aperture therein, means for directing a charge of oil fuel onto said igniter, and an annular flange on the piston adapted to engage the outer surface of the igniter atthe end of the backward stroke of the piston.

4. In an internal combustion engine, a cylinder, a piston therein, a head on said cylinder having an aperture therein, a cylindrical igniter of less diameter than said aperture arranged therein, and projecting 25 into theyylinder, said igniter being prolded wlth an opening occurring in the aperture in the cylinder head, and an annu- Iar flange on the piston adapted'to engage the outer surface of the igniter at the end of 80 the backward stroke of the piston.

In testimony whereof, We have hereunto set our hands at Sacramento, California, this 20th day of June, 1913.

ALBERT H. DE GASTON.

FREDERIC MGLEAN.

In the presence of- FRANK F. CAETLE,

H. G. Pnosr. 

